European Journal of Science and Technology最新文献_第5页

Risk Analysis and Risk Assessment in Laboratory Studies 实验室研究中的风险分析和风险评估

European Journal of Science and Technology Pub Date : 2023-03-23 DOI: 10.31590/ejosat.1260340

Vedat Karahan, E. Aydoğmuş

引用次数: 1

Electronic Properties of FLG/InP Schottky Contacts FLG/InP肖特基触点的电子特性

European Journal of Science and Technology Pub Date : 2023-03-22 DOI: 10.31590/ejosat.1265636

Fulya Esra CİMİLLİ ÇATIR, Murat Gülnahar

{"title":"Electronic Properties of FLG/InP Schottky Contacts","authors":"Fulya Esra CİMİLLİ ÇATIR, Murat Gülnahar","doi":"10.31590/ejosat.1265636","DOIUrl":"https://doi.org/10.31590/ejosat.1265636","url":null,"abstract":"Graphene (Gr) is of great interest in the development of new electronic, photonic, and composite materials. The physical properties of Gr can vary depending on the number of layers, and this unique property makes it a potential material for different electronic applications. In this study, few-layer graphene (FLG) film was spin-coated onto the InP semiconductor surface and the FLG/n-InP Schottky contact was produced. The properties and quality of the FLG nano-film were determined by using Raman spectroscopy. Parameters such as ideality factor, barrier height, and series resistance of Schottky contacts were calculated using current-voltage (I-V) curves. With the Gaussian distribution, the mean ideality factor of the Gr/InP contacts was found to be =1,47, and the mean barrier height values were found to be =0.68 eV. The standard deviation values were calculated as σ=0.32 for the ideality factor and σ=0.06 eV for the barrier height. In addition, the series resistance values were calculated from the Cheung functions and were found to be in agreement with the literature. Finally, the current conduction mechanisms of the Gr/n-InP structure were revealed by examining the logarithmic I-V characteristics.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72707219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emerging Technologies for Fluorescence-Based Optical Test Strip Readers 基于荧光的光学测试条读取器的新兴技术

European Journal of Science and Technology Pub Date : 2023-03-22 DOI: 10.31590/ejosat.1265098

Seda Aksoy, A. Dulda, Gökhan Ertaş

{"title":"Emerging Technologies for Fluorescence-Based Optical Test Strip Readers","authors":"Seda Aksoy, A. Dulda, Gökhan Ertaş","doi":"10.31590/ejosat.1265098","DOIUrl":"https://doi.org/10.31590/ejosat.1265098","url":null,"abstract":"Fluorescence-based optical test strip readers are used to detect and quantify fluorescent signals from immunoassay test strips in medicine, especially for point-of-care applications. The design of optical systems including light sources and detection systems in these devices is not only indispensable but also the most critical part for specific detection applications. This study aims to provide detailed information about fluorescence-based optical test strip readers, existing and emerging technologies, and their contributions to the design of the device. The most commonly used technologies of light sources and detection systems have been discussed and compared for the ideal design. Arc and Xenon lamps may not be appropriate for portable and low-cost devices as they are larger and more costly when compared to LEDs and laser diodes. Photodiodes and CMOS detectors can be used for the design of low-cost, portable fluorescence-based optical test strip readers as they are cheaper and smaller in size when compared to CCDs and PMTs. Both light source and detector should be chosen according to the application priorities and spectral characteristics of the fluorescent molecule by integrating them with proper optical elements like filters, mirrors, etc. This study contributes to the people who are interested in the design of fluorescence-based optical test strip readers as it serves as a guideline for the optical test strip reader systems.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"191 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74058207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Time Series and Data Science Preprocessing Approaches for Earthquake Analysis 地震分析的时间序列和数据科学预处理方法

European Journal of Science and Technology Pub Date : 2023-03-22 DOI: 10.31590/ejosat.1265261

Mustafa Kanber, Yunus Santur

{"title":"Time Series and Data Science Preprocessing Approaches for Earthquake Analysis","authors":"Mustafa Kanber, Yunus Santur","doi":"10.31590/ejosat.1265261","DOIUrl":"https://doi.org/10.31590/ejosat.1265261","url":null,"abstract":"Time series are frequently used today to analyze data that changes over time and to predict future trends. Usage areas of time series data include many applications such as financial market forecasts, weather forecasts, sales forecasts, medical diagnostics and stock management. Among the methods, there are techniques such as autoregressive integration, moving average, long-short-term memory neural network, time series condensation, wavelet transform and Frequency Domain. These techniques are chosen depending on the characteristics of the time series data and their intended use. For example, the ARIMA model is used for variable variance and non-stationary time series, while the LSTM model may be more suitable for capturing long-term dependencies. In this article, it has been tried to prove that time series based artificial intelligence systems can be built on fault movements, which are very difficult to predict on earthquake time series data, and it is quite possible to get useful results. In particular, deep learning methods are among the prominent methods in the article. Deep learning methods are used to detect complex structures and analyze large datasets to produce accurate results. These methods include multilayer perceptrons, long-short-term memory neural network, and radial-based function network. It is also emphasized that factors such as the selection of features used in earthquake prediction, data preprocessing, feature engineering and correct model selection are also important. As a result, the use of artificial intelligence techniques on earthquake time series data has great potential in estimating earthquake risk. Deep learning methods perform better, especially for large datasets, and more accurate results can be obtained with the right model selection. However, factors such as data preprocessing and feature selection also need to be considered.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73897599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of WBCs, CRP, LDH and other Biomarkers of Moderate and Severe COVID-19 Patients in Iraq 伊拉克中重度新冠肺炎患者白细胞、CRP、LDH等生物标志物检测

European Journal of Science and Technology Pub Date : 2023-03-22 DOI: 10.31590/ejosat.1266055

M. Salman, Ansam Atwan Abdulah

{"title":"Assessment of WBCs, CRP, LDH and other Biomarkers of Moderate and Severe COVID-19 Patients in Iraq","authors":"M. Salman, Ansam Atwan Abdulah","doi":"10.31590/ejosat.1266055","DOIUrl":"https://doi.org/10.31590/ejosat.1266055","url":null,"abstract":"Background: \u0000Though most Iraqi patients who are infected by COVID-19 only suffering from mild symptoms, but in some cases a patient’s condition deteriorates, leading to a negative outcome. This study aims to assess the clinical laboratory features of moderate and severe COVID-19 patients \u0000Methods: \u0000One hundred diagnosed as moderate and severe COVID-19 patients as well as fifty healthy participants were involved in our current study. Assessment was made for WBCs, Monocytes, Lymphocyte, and Platelets. In addition, serum levels of lactate dehydrogenase (LDH) and C-reactive protein (CRP). \u0000Results: \u0000A hundred patients aged 33 to 70 years with COVID-19 had severe and moderate cases. Present in DAR AL-SALAM for COVID-19 isolation in Baghdad, Iraq. COVID-19 patients showed increased serum levels LDH and CRP as well as WBCs count and others when compared to healthy individuals. The severe group showed a statistically significant increase in WBCs account, neutrophil activity and LDH levels, compared with moderate group. While the moderate COVID-19 groups displayed a significant rise in lymphocytes activity, CRP, and Platelet. Conclusion: \u0000The current investigation found that WBC count, lymphocyte count, LDH activity, and CRP level were effective indicators for determining the severity of COVID-19, making them good assessment indicators.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85757719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative Products For Fluid Requirements 流体需求的创新产品

European Journal of Science and Technology Pub Date : 2023-03-20 DOI: 10.31590/ejosat.1250692

Nadiye BARIŞ EREN

{"title":"Innovative Products For Fluid Requirements","authors":"Nadiye BARIŞ EREN","doi":"10.31590/ejosat.1250692","DOIUrl":"https://doi.org/10.31590/ejosat.1250692","url":null,"abstract":"Innovative product examples are frequently encountered in every field in our daily life. One of these areas is the health sector. Innovative products developed in the health sector increase both the quality of care and patient satisfaction in patient care applications. On the other hand, it also reduces the workload of health workers. Therefore, these innovative products have a very important place. This research aimed to reveal innovative product examples for fluid requirement applications. In this direction, patent and utility model results were obtained by writing the word \"patient\" in the invention summary section on the official page of the Turkish Patent and Trademark Office. On the official page of the Turkish Patent and Trademark Office, there are many examples of patents and utility models whose application process has been completed or ongoing, and this text includes patent and utility model results related to fluid requirement applications covering the last 5 years. Examples of patents include “New Type Central Venous Catheter”, “Safe Patient Hand Constant”, “Catheterization Fixation and Labeling Device” and “Jugular Venous Catheter Stabilizing Dressing Apparatus”. As an example of a utility model, “A Medical Serum Hanger” is discussed. As a result, these innovative products developed for fluid requirement applications will provide convenience to healthcare professionals in the care and treatment of patients. Following, using and sharing the outputs of these developed products with other users will lead to an increase in the number of these products and their widespread use.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86346476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eminönü Hanlar Bölgesi’nin Tarihsel Süreç İçinde Gelişimi

European Journal of Science and Technology Pub Date : 2023-03-14 DOI: 10.31590/ejosat.1223667

Şeyma KİRAZ EKŞİ, Leyla Suri̇

{"title":"Eminönü Hanlar Bölgesi’nin Tarihsel Süreç İçinde Gelişimi","authors":"Şeyma KİRAZ EKŞİ, Leyla Suri̇","doi":"10.31590/ejosat.1223667","DOIUrl":"https://doi.org/10.31590/ejosat.1223667","url":null,"abstract":"Geçmişten günümüze ticari faaliyetlerin merkezi niteliğindeki Hanlar Bölgesi, Haliç’in korunaklı bir liman olma özelliğine bağlı olarak gelişimini sürdürmüştür. Günümüzde aktif olarak işleyişini sürdürse de ticari faaliyetlerin farklı alanlara yönelmiş olması nedeniyle, tam kapasite kullanılmamaktadır. Han yapılarının büyük bir kısmı günümüze ulaşmış ancak; bölgenin süreç içinde yaşadığı değişimlere ayak uyduramamıştır. Bu durum, doku ve yapı ölçeğinde bölgenin yeniden değerlendirilmesi ihtiyacını açığa çıkartmıştır. \u0000Hanlar Bölgesi; İstanbul tarihi Yarımada’nın Eminönü ilçesi Haliç limanından Beyazıt yönüne doğru uzanan aksın üzerinde konumlanan alandır. Rüstem Paşa, Tahtakale, Mercan, Sururi, Daya Hatun, Beyazıt mahallelerini kapsamaktadır. Kara yolarının 16. Yüzyıla dek gelişmemiş olmasından dolayı şehrin gelişimi, deniz ticareti etkisiyle şekillenmiştir. \u0000Çalışma kapsamında mevcut durumun tespit edilerek özgün karakterinin belgelenmesi amaçlanmış ve devamında; bölgenin tekrar canlandırılması için öneriler geliştirilmeye çalışılmıştır.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89682494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ergonomic Analysis of Working Postures in Hawthorn Fruit (Crataegus Spp.) Picking 山楂采摘工作姿势的工效学分析

European Journal of Science and Technology Pub Date : 2023-03-14 DOI: 10.31590/ejosat.1194913

Yusuf Dilay, Adem Özkan

{"title":"Ergonomic Analysis of Working Postures in Hawthorn Fruit (Crataegus Spp.) Picking","authors":"Yusuf Dilay, Adem Özkan","doi":"10.31590/ejosat.1194913","DOIUrl":"https://doi.org/10.31590/ejosat.1194913","url":null,"abstract":"İnsanların beslenmesinde kullanılan tarım ürünlerinin birçoğunun kültürü yapılmaktadır. Ancak bazı ürünler ise doğada kendiliğinden yetişmektedir. Bu ürünler suya ihtiyaç duymadığı gibi çoğu zaman tarımsal mücadele, gübreleme gibi diğer tarımsal işlemler ve uygulamalara da ihtiyaç duymazlar. Kendiliğinden büyür, gelişir ve meyve verirler. Bu tip bitkiler ya da ağaçlar doğada kendileri için en uygun yerlerde bulunurlar. Kendini korumak için çoğu zaman ya sarp kayalık yerlerde yetişirler ya da meyveleri dikenli ve ulaşılması zor yerlerdedir. Çoğu zaman eğimli, sarp ve dağlık yerlerde kendiliğinden yetişen bitkilerin, meyvelerinin ya da diğer kısımların toplanmasında tarımsal mekanizasyon araçları kullanılamamaktadır. Bu işlemlerin tümünün insan eli ile yapılması gerekmektedir. Bu bitkilerin meyveleri olgunlaştığında toplanmadığında kendiliğinden yere düşmektedir. Bu meyveleri toplayan kişiler bazen dalların arasından bazen de yere dökülen meyveleri toplamak zorunda kalabilirler. Özellikle küçük boyutlu meyvelerin toplanması çok zaman alabilmektedir. Bu durumda uzun bir süre zor koşullarda çalışan toplayıcıların çeşitli fiziksel zorlamalara maruz kaldıkları söylenebilir. Bunların çalışma durumlarının incelenerek, ergonomik analizinin yapılması ve elde edilecek sonuçlara göre önerilerde bulunulması insan sağlığı için büyük önem taşımaktadır. \u0000Bu çalışmada, eğimli bir zeminde kendiliğinden yetişmiş olan bir grup alıç ağacında geleneksel yollarla yapılan meyve toplama işleminde, toplayıcıların duruşları kamera ile kayıt altına alınmıştır. Elde edilen veriler, OWAS (Hızlı Tüm Vücut Değerlendirmesi) kriterlerine göre belirlenmiş ve EgroFellow 3.0. yazılımı kullanılarak, sınıflandırılmıştır. Böylece alıç toplama esnasında çalışanların duruşlarından elde edilen veriler incelenip, uygun olmayan duruşlar belirlenmiştir. Bunların yol açtığı kas ve iskelet sistemi rahatsızlıklarına neden olabilecek risklerin önceden tahmin edilip, en aza indirmesi ve duruşlarda iyileştirmeler sağlanması mümkün olacaktır.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79075191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Г-Shaped Asymmetrical Monopole Antenna on Truncated DGS For Multiband RF Energy Harvesting Applications Г-Shaped用于多波段射频能量采集的截断DGS非对称单极天线

European Journal of Science and Technology Pub Date : 2023-03-08 DOI: 10.31590/ejosat.1252559

Yunus Emre Kuşi̇n, Merih Palandöken

引用次数: 0

Sensing Magnetic Field with Single-Spin Dynamical Probe State: Control over Sensing Precision via Quantum Fisher Information 单自旋动态探针态感应磁场:利用量子费雪信息控制感应精度

European Journal of Science and Technology Pub Date : 2023-03-08 DOI: 10.31590/ejosat.1249710

S. Borisenok

{"title":"Sensing Magnetic Field with Single-Spin Dynamical Probe State: Control over Sensing Precision via Quantum Fisher Information","authors":"S. Borisenok","doi":"10.31590/ejosat.1249710","DOIUrl":"https://doi.org/10.31590/ejosat.1249710","url":null,"abstract":"Quantum sensors play an important role in many branches of modern science, and they occupy a huge segment of the growing market for quantum devices. Quantum sensors use qubits and their analogs as detecting and analyzing quantum elements. Some sensors can be based on a single qubit, which is often presented as a system making its evolution on the so-called Bloch sphere. Different criteria are used to evaluate the efficiency of the sensing process. One of the most popular is the Quantum Fisher Information Matrix (QFIM) based on Fisher information. The magnitudes of the QFIM elements are strongly related to the precision of the sensing. As an analog of the classical Cramér theorem, one can define the quantum Cramér-Rao bound for the variance V, which is equal to V = 1/NF where F is the corresponding quantum Fisher information element, and N stands for the number of repeated sensory measurements. In this work, we develop our quantum Fisher information-based approach for a single feedback-driven qubit-type element for sensing external magnetic fields. We demonstrate the efficiency of our algorithm and discuss its further possible improvement. The approach developed here can be easily extended to other sensing schemes: collective spin systems and multi-qubit-based sensors. Alternative control algorithms can be applied to drive the probe state vector for maximization of the QFIM components. The particular choice of the control algorithm is defined by the specific experimental set-up.","PeriodicalId":12068,"journal":{"name":"European Journal of Science and Technology","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81033891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0